场景：将一个层级类对象(领域驱动model对象)转换为平铺类对象(view)

src对象，(红框为子对象)

target对象(平铺对象)

代码思路，先递归反射遍历出所有字段，存到一个map里，再递归赋值给target对象

缺陷：不同子对象间的同名字段会被覆盖成一个值

代码

private static void getSrcALLFieldMap(Object obj,Map collectMap){

Class srcClazz = obj.getClass();

Field[] srcFields = srcClazz.getDeclaredFields();

Stream.of(srcFields).forEach(field -> {

field.setAccessible(true);

try {

if(field.getType().toString().contains("aacoin.account") && !field.getType().isEnum()){

Object subObj = field.get(obj);

if(subObj!=null)

getSrcALLFieldMap(subObj,collectMap);

}else{

collectMap.put(field.getName(),field.get(obj));

}

} catch (IllegalAccessException e) {

e.printStackTrace();

}

});

}

private static void setTargetAllField(Object obj, Map srcMap){

Class srcClazz = obj.getClass();

Field[] srcFields = srcClazz.getDeclaredFields();

Stream.of(srcFields).forEach(field -> {

field.setAccessible(true);

try {

if(field.getType().toString().contains("aacoin.trade.otc") && !field.getType().isEnum()){

Object subObj = field.get(obj);

if(subObj == null) {

Constructor cons = field.getType().getDeclaredConstructor(null);

cons.setAccessible(true);

subObj = cons.newInstance(null);

field.set(obj, subObj);

}

setTargetAllField(subObj, srcMap);

}else{

//collectMap.put(field,obj);

Object currentField = srcMap.get(field.getName());

if( currentField !=null && field.getType() == currentField.getClass()){

field.set(obj,currentField);

}

}

} catch (IllegalAccessException e) {

e.printStackTrace();

} catch (InstantiationException e) {

e.printStackTrace();

} catch (NoSuchMethodException e) {

e.printStackTrace();

} catch (InvocationTargetException e) {

e.printStackTrace();

}

});

}

public static T convert(Object src,Class tClass){

Constructor cons = null;

try {

cons = tClass.getDeclaredConstructor(null);

} catch (NoSuchMethodException e) {

e.printStackTrace();

}

cons.setAccessible(true);

T result = null;

try {

result = cons.newInstance(null);

} catch (InstantiationException e) {

e.printStackTrace();

} catch (IllegalAccessException e) {

e.printStackTrace();

} catch (InvocationTargetException e) {

e.printStackTrace();

}

convert(src,result);

return result;

}

public static T convert(Object src,T result) {

Map srcMap = new HashMap();

getSrcALLFieldMap(src,srcMap);

setTargetAllField(result,srcMap);

return result;

}

调用：

adverVO =convert(advert,AdvertVO.class);

写的比较随意，直接吞掉了异常，需自行处理，将异常统一规范抛出

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